Answer:
<em>Prepositions of Place</em>
1. He is sleeping <u>on</u> the sofa.
2. He is writing <u>on</u> the board.
3. He is standing <u>in front of</u> the bookcase.
4. The elephant is <u>behind</u> the lion.
5. The book is <u>in</u> the bag.
<em>Prepositions of Time</em>
1. Her birthday is <u>on</u> March 15th.
2. He plays basketball <u>on</u> weekends.
3. He goes to the beach <u>in</u> the summer.
4. He does his homework <u>in</u> the afternoon.
5. We have exams <u>in</u> September.
<em>Hope this helped ^-^</em>